Make ICs and your lower management team onboard new VPs and C-levels at your peril. I spoke to three great ex-coworkers who moved on to new jobs, stating they didn't have it in them to be consistently turned down for promotions while they essentially running a school for a steady stream of new bosses.
Workers don't expect to get promoted yearly. But when you do this to them, you send a message that you value them mostly as the trainer for a series of failed hires of their own bosses. They won't stick around when better opportunities arise. It makes you look bad, and your org pays a price.
If you keep thinking that your org needs an expert from outside and said, especially when the experts have an average of 2.5 years per job, it's probably time to rethink your hiring and internal training and promotion process.